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SANDWELL AND WEST BIRMINGHAM HOSPITALS City Hospital Department of Clinical Chemistry Questions Set by Trainer – Chemical Toxicology Name: Date: Supervisor: Section: General Toxicology 1. What laboratory tests can help with the investigation of the poisoned patient? (Consider tests under the following headings: General Biochemistry, General Haematology, Drugs & Therapeutic Drug Monitoring (TDMs), Alcohols, Toxicology, Metals, Others). (See: Thompson JP1, Watson ID, Thanacoody HK, Morley S, Thomas SH, Eddleston M, Vale JA, Bateman DN, Krishna CV. (2014). Guidelines for laboratory analyses for poisoned patients in the United Kingdom. Ann Clin Biochem. 51: 312-325). 2. State a recognised equation for calculating the osmolar gap. (More than one exists). 3. What is the definition of the osmolar gap? 4. State the equation for calculating the anion gap. 5. What is the definition of the anion gap? 6. Review the following Biochemistry results on a patient presenting to A&E: Sodium: Potassium: Chloride: Bicarbonate: Urea: 7. Creatinine: 138 mmol/L 4.0 mmol/L 110 mmol/L 6 mmol/L 4.7 mmol/L 105 µmol/L 8. Calculate the osmolar gap. 9. Calculate the anion gap. Glucose: Osmolality: 5.3 mmol/L 364 mOsm/kg Paracetamol 10.Outline the metabolism of paracetamol. 11.What is the name of the paracetamol metabolite responsible for liver toxicity? 12.Name 2 antidotes used to treat paracetamol over-doses? 13.Review the paracetamol treatment nonagram: 14.What does the treatment line indicate? 15.With which patients should you use the ‘High-risk treatment line’? 16.Why are the treatment lines not solid (-----) after 15 hours? 17.Would you need to treat a patient who presented to A&E 10 hours after a paracetamol overdose, whose paracetamol level is 60 mg/L? 18.What if the patient in section d. was known to be prescribed phenytoin and is anorexic, would you need to treat? Antidotes Name the specific antidote(s) that can be used to treat the following toxic compounds: 19.Opiates/Opioids 20.Digoxin 21.Cyanide 22.Paraquat 23.Arsenic 24.Iron 25.Lead Toxic alcohols 26.Outline the metabolism of ethanol. 27.What is the ethanol drink drive limit in England, Wales and Northern Ireland? 28.Plasma: 29.Urine: 30.What are the long-term complications of chronic alcohol abuse? 31.What products contain ethylene glyol? 32.Outline the metabolism of ethylene glycol. 33.What are the clinical signs / symptoms of ethylene glycol poisoning? 34.What biochemical changes may you see in severe ethylene glycol toxicity? 35.What products contain methanol? 36.Outline the metabolism of methanol. 37.What are the clinical signs / symptoms of methanol poisoning? 38.What antidotes can be prescribed to treat ethylene glycol and methanol poisoning? 39.What is their mechanism of action? 40.What other treatments can be used for ethylene glycol and methanol poisoning? 41.Describe the method principle for ethanol analysis, as performed in the main biochemistry laboratory. 42.What is the gold standard method for ethanol analysis? 43.Describe the method principle for ethylene glycol analysis, as performed in the Toxicology laboratory. 44.Describe the method principle for ethanol and methanol analysis, as performed in the Toxicology laboratory. Carbon monoxide 45.What is carbon monoxide and where is it found? 46.Describe the pathophysiology of carbon monoxide toxicity. 47.What are the signs / symptoms of carbon monoxide poisoning? 48.How is carbon monoxide measured in the laboratory? 49.What is the reference range for carbon monoxide in non-smokers? 50.What is the reference range for carbon monoxide in smokers? 51.How is carbon monoxide poisoning treated? General 1. What is the difference between clinical and forensic toxicology? 2. Where can clinicians and laboratory professionals obtain advice regarding poisoning? 3. Where can the public obtain advice regarding poisoning? 4. Where can people seek advice regarding environmental toxicology? 5. Where can people seek advice regarding occupational toxicology? Standards linked to IBMS portfolio: EMPLOYEE SIGNATURE SUPERVISOR SIGNATURE Name: Name: Date: Date: